The facade of this 16th-century building is decorated with carvings of 300 seashells.

These fly sculptures are scattered around the city and represent the patron saint of Girona.

This historic electric train has operated with regularity since the early 1900s.

Spain's largest bullring offers a unique glimpse at architecture and history.

Walls of stone rise up from sinkholes caused by underwater erosion.

Medieval village and microminiature museum.

Two large eyes painted anonymously on a mountain overlooking the city pay homage to an old legend.

Long tunnels run under the ancient chariot racing circuit to the tower.

Geological storytelling.

An abandoned Indian-inspired mansion.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

Seaside ruins of a settlement that date back to the first century B.C.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

Cliffside houses provide a spectacular view from their perch above the valley.

Stunning Roman aqueduct used for 1900 years and still standing.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

The final resting place of the great navigator, or maybe his brother.

The world's largest wooden structure.